/*
 * jQuery Iframe Transport Plugin 1.8.2
 * https://github.com/blueimp/jQuery-File-Upload
 *
 * Copyright 2011, Sebastian Tschan
 * https://blueimp.net
 *
 * Licensed under the MIT license:
 * http://www.opensource.org/licenses/MIT
 */
/* global define, window, document */
(function(factory) {
    "use strict";
    if (typeof define === "function") {
        // Register as an anonymous AMD module:
        define("jquery/blueimp-file-upload/9.5.2/iframe-transport-debug", [ "jquery-debug" ], factory);
    } else {
        // Browser globals:
        factory(window.jQuery);
    }
})(function($) {
    "use strict";
    // Helper variable to create unique names for the transport iframes:
    var counter = 0;
    // The iframe transport accepts four additional options:
    // options.fileInput: a jQuery collection of file input fields
    // options.paramName: the parameter name for the file form data,
    //  overrides the name property of the file input field(s),
    //  can be a string or an array of strings.
    // options.formData: an array of objects with name and value properties,
    //  equivalent to the return data of .serializeArray(), e.g.:
    //  [{name: 'a', value: 1}, {name: 'b', value: 2}]
    // options.initialIframeSrc: the URL of the initial iframe src,
    //  by default set to "javascript:false;"
    $.ajaxTransport("iframe", function(options) {
        if (options.async) {
            // javascript:false as initial iframe src
            // prevents warning popups on HTTPS in IE6:
            /*jshint scripturl: true */
            var initialIframeSrc = options.initialIframeSrc || "javascript:false;", /*jshint scripturl: false */
            form, iframe, addParamChar;
            return {
                send: function(_, completeCallback) {
                    form = $('<form style="display:none;"></form>');
                    form.attr("accept-charset", options.formAcceptCharset);
                    addParamChar = /\?/.test(options.url) ? "&" : "?";
                    // XDomainRequest only supports GET and POST:
                    if (options.type === "DELETE") {
                        options.url = options.url + addParamChar + "_method=DELETE";
                        options.type = "POST";
                    } else if (options.type === "PUT") {
                        options.url = options.url + addParamChar + "_method=PUT";
                        options.type = "POST";
                    } else if (options.type === "PATCH") {
                        options.url = options.url + addParamChar + "_method=PATCH";
                        options.type = "POST";
                    }
                    // IE versions below IE8 cannot set the name property of
                    // elements that have already been added to the DOM,
                    // so we set the name along with the iframe HTML markup:
                    counter += 1;
                    iframe = $('<iframe src="' + initialIframeSrc + '" name="iframe-transport-' + counter + '"></iframe>').bind("load", function() {
                        var fileInputClones, paramNames = $.isArray(options.paramName) ? options.paramName : [ options.paramName ];
                        iframe.unbind("load").bind("load", function() {
                            var response;
                            // Wrap in a try/catch block to catch exceptions thrown
                            // when trying to access cross-domain iframe contents:
                            try {
                                response = iframe.contents();
                                // Google Chrome and Firefox do not throw an
                                // exception when calling iframe.contents() on
                                // cross-domain requests, so we unify the response:
                                if (!response.length || !response[0].firstChild) {
                                    throw new Error();
                                }
                            } catch (e) {
                                response = undefined;
                            }
                            // The complete callback returns the
                            // iframe content document as response object:
                            completeCallback(200, "success", {
                                iframe: response
                            });
                            // Fix for IE endless progress bar activity bug
                            // (happens on form submits to iframe targets):
                            $('<iframe src="' + initialIframeSrc + '"></iframe>').appendTo(form);
                            window.setTimeout(function() {
                                // Removing the form in a setTimeout call
                                // allows Chrome's developer tools to display
                                // the response result
                                form.remove();
                            }, 0);
                        });
                        form.prop("target", iframe.prop("name")).prop("action", options.url).prop("method", options.type);
                        if (options.formData) {
                            $.each(options.formData, function(index, field) {
                                $('<input type="hidden"/>').prop("name", field.name).val(field.value).appendTo(form);
                            });
                        }
                        if (options.fileInput && options.fileInput.length && options.type === "POST") {
                            fileInputClones = options.fileInput.clone();
                            // Insert a clone for each file input field:
                            options.fileInput.after(function(index) {
                                return fileInputClones[index];
                            });
                            if (options.paramName) {
                                options.fileInput.each(function(index) {
                                    $(this).prop("name", paramNames[index] || options.paramName);
                                });
                            }
                            // Appending the file input fields to the hidden form
                            // removes them from their original location:
                            form.append(options.fileInput).prop("enctype", "multipart/form-data").prop("encoding", "multipart/form-data");
                            // Remove the HTML5 form attribute from the input(s):
                            options.fileInput.removeAttr("form");
                        }
                        form.submit();
                        // Insert the file input fields at their original location
                        // by replacing the clones with the originals:
                        if (fileInputClones && fileInputClones.length) {
                            options.fileInput.each(function(index, input) {
                                var clone = $(fileInputClones[index]);
                                // Restore the original name and form properties:
                                $(input).prop("name", clone.prop("name")).attr("form", clone.attr("form"));
                                clone.replaceWith(input);
                            });
                        }
                    });
                    form.append(iframe).appendTo(document.body);
                },
                abort: function() {
                    if (iframe) {
                        // javascript:false as iframe src aborts the request
                        // and prevents warning popups on HTTPS in IE6.
                        // concat is used to avoid the "Script URL" JSLint error:
                        iframe.unbind("load").prop("src", initialIframeSrc);
                    }
                    if (form) {
                        form.remove();
                    }
                }
            };
        }
    });
    // The iframe transport returns the iframe content document as response.
    // The following adds converters from iframe to text, json, html, xml
    // and script.
    // Please note that the Content-Type for JSON responses has to be text/plain
    // or text/html, if the browser doesn't include application/json in the
    // Accept header, else IE will show a download dialog.
    // The Content-Type for XML responses on the other hand has to be always
    // application/xml or text/xml, so IE properly parses the XML response.
    // See also
    // https://github.com/blueimp/jQuery-File-Upload/wiki/Setup#content-type-negotiation
    $.ajaxSetup({
        converters: {
            "iframe text": function(iframe) {
                return iframe && $(iframe[0].body).text();
            },
            "iframe json": function(iframe) {
                return iframe && $.parseJSON($(iframe[0].body).text());
            },
            "iframe html": function(iframe) {
                return iframe && $(iframe[0].body).html();
            },
            "iframe xml": function(iframe) {
                var xmlDoc = iframe && iframe[0];
                return xmlDoc && $.isXMLDoc(xmlDoc) ? xmlDoc : $.parseXML(xmlDoc.XMLDocument && xmlDoc.XMLDocument.xml || $(xmlDoc.body).html());
            },
            "iframe script": function(iframe) {
                return iframe && $.globalEval($(iframe[0].body).text());
            }
        }
    });
});
